Now the bad news...
I have 2 CPUs P3-500Mhz, 512Meg ram. So I ran 2 bonnies at the same time.
Kernel 2.4.20-8 with 2 Bonnies at the same time:
Version 1.03 ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
watkins-ho 1G 3091 85 18593 44 9733 24 3443 97 59895 60 249.6 6
watkins-ho 1G 2980 87 21176 54 10167 23 3478 99 44525 44 384.2 9
---- ----- ----- ---- ------ -----
Total 6071 39769 19900 6921 104420 633.8
Kernel 2.4.28 with 2 Bonnies at the same time:
watkins-ho 1G 4456 92 17922 52 6489 17 4961 96 26571 32 320.4 12
watkins-ho 1G 4343 89 17987 52 6197 17 4946 96 25646 31 363.7 7
---- ----- ----- ---- ------ -----
Total 8799 35909 12686 9907 52217 684.1
Very odd, the sequential read speed is almost exactly 1/2 now.
Oh well, I still can't tell without a tool to measure the speed.
But I still don't like it!
My network is only 100BaseT, so it is still well beyond that!
Guy
-----Original Message-----
From: linux-raid-owner@xxxxxxxxxxxxxxx
[mailto:linux-raid-owner@xxxxxxxxxxxxxxx] On Behalf Of Guy
Sent: Wednesday, January 12, 2005 1:17 AM
To: linux-raid@xxxxxxxxxxxxxxx
Subject: raid5 performance after upgrade to 2.4.28
About 1 month ago I upgraded from Kernel 2.4.20-8 to 2.4.28.
Today I noticed my sequential read speed is up by about 12%.
I don't recall making any other changes that would affect speed.
So, I guess the Kernel upgrade made the difference.
An old bonnie output:
Version 1.03 ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
watkins-ho 1G 3293 97 34587 89 22306 53 3549 99 67492 63 500.1 9
Today:
watkins-ho 1G 4944 99 31719 65 18538 43 5184 98 75440 71 602.5 8
^^^^ ^^^^ ^^^^^ ^^^^^
Some things improved, others decreased.
Of course, no change I can notice on my own.
I needed to measure performance to notice.
I guess I should try Kernel 2.6 some day.
Guy
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